Bur-holder attachment for knitting-machines



No. 609,594. Patented Aug. 23, I898. H. V. H. SMITH.

BUR HOLDER ATTACHMENT FOR KNITTING MACHINES.

(Application filed July 23 1897.) (No Model.) 2 Sheets-Sheet No.609,594. Patented Aug. 23. I898. H. .V. H SMITH. BUR HOLDER ATTACHMENTFOR KNITTING MACHINES.

(Application filed July 23, 1897.)

2 Sheets-Sheet 2.

(No Model.)

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NiTED .JVSTATES' PATENT OFFICE;

HENRY V. H. SMITH, OF NORFOLK, VIRGINIA, ASSIGNOR TO TOMPKINS IBROTHERS, OF TROY, NEW YORK.

BUR-HOLDER ATTACHMENT FOR KNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 609,594, dated August23, 1898.

Application filed July 23, 1897.

T0 aZZ whom it may concern.-

Be it known that I, HENRY V. H. SMITH, of the city of Norfolk, county ofNorfolk, State of Virginia, have invented new anduseful Improvements inBur-Holder Attachments for Knitting-Machines, of which the following isa specification.

My invention relates to that class of devices which are used topositionand relatively adjust the sinker-burs of knitting-machines to theneedles of the latter, and more particularly to a mechanism fordelicately adjusting the sinker-burs, so as to give any desired pitch tothe latter which may be required. I

Accompanying this specification to form a part of it there are twoplates of drawings containing five figures illustrating the applicationof my invention, with the same desig-l nation of parts by letterreference used in all of them.

Of the illustrations, Figure 1 is a perspective of a knitting-machinebur-holder standard, to which my invention is shown as applied. Fig. 2is a central vertical section of the apparatus shown at Fig. 1,illustrating a part of the machine-table. Fig. 3 is a section taken onthe line cc of Fig. 2. Fig. 4 is a side elevation of a gear-wheel havinga grooved perimeter and which is mounted upon a sleeve provided withtrunnion-form journals, which when in position for use in the machine ismounted upon and secured to the bur-holder bar. Fig.5 is a sideelevation of the gearwheel which is shown at Fig. 4 and the shaft havinga worm-gear formed thereon and arranged to mesh into the perimetralteeth of said wheel to rotate it.

The several parts of the apparatus thus illustrated are designated byletter reference, and the function of the parts is described as follows:

The letter T designates the machine-table, and S the bur-holderstandard, attached to and upwardly projected from the machinetable.

The letter B designates a bracket which attaches adjustably to the outerside of the standard in ofiset projection by means of a slot Svertically formed in the standard, a bolt 12 having a head h to straddlethe sides Serial No- 645,'753. (No model.)

of the slot in the standard, and a retainingnut 92, which is threadedonto said bolt where it is in passing through the bracket extendedbeyond the latter at Z. This bracket 13 has ofiset from its outer sidethe horizontally-extended arm A, which is'of atubular form and isrecessed at a to receive the worm-actuated wheel W and is provided withbearings for the worm-gear shaft to journal in at a.

f The letter K designates a cap which is threaded onto the outer end ofthe bur-holder bar If, and the letter M designates a head which is madewith a neck m adapted to enter the tube-form area a of the arm A at itsouter end, and is provided with an encircling collar N, which when theneck of the 'headis entered within the interior area a of the arm A willabut against the outer end of the latter at 02 The letter O designates agrip-nut which is threaded onto the bar 19 and arranged between the capK and the head M, by means of which when the nut is turned on itsthreaded connection with the bar 19 the latter may be moved outwardly orinwardly to position the sinker-bur relatively to the needles as tohorizontal adjustment with the cap K, turned to' hold the grip-nut andkeep the parts in .position as thus adjusted.

The letter 25 designates a set-screw which is threaded into astop-collar I, arranged to project outwardly through a slot S openingout through the bottom of the tubular area a. This set-screw is providedwith a head 25 adapted to straddle the slot in which it is placed and tohold the collar 1 in a desired position to regulate the resilient actionof the spring 0, arranged in the tube-form area a to encircle the bar 12between the stop I and the collar cl, also arranged in the interior areaa and fast upon bar 19 The letter L designates another set-screw, whichis threaded into the arm A, and when screwed inwardly is adaptedtoengage with the neck of the head M (indicated at m to hold the head inplace.

The wheel TV has its gear-teeth preferably formed in a groovecircumferentially made in the perimeter of the wheel, and the latter isprovided with trunnion-form journals J J, one of which turns in theinner end of the when actuated to turn also operates the bar b to turn.

The letter a designates a shaft which is horizontally arranged tojournal in the bracket B at a a and this shaft'is provided with aworm-gear G, adapted to mesh into the*perimetral teeth of the wheel W,and when this shaft is turned it actuates the latter and the bur-holderbar 5 to turn with a slowly-actuated and delicate movement.

The letter F designates the bur holder proper, which is secured to theinner end of the bar b at f and therefrom is projected downwardly andlaterally on an angle to produce the shelf f into the upper surface ofwhich the sinker-bur 13 journals vertically.

As thus constructed, when it is desired to operate the bar 12 to moveinwardly, so as to bring the sinker-bur blades farther inward betweenthe needles, the cap K is screwed outwardly and the grip-nut C is turnedon its threaded connection with the bar 71 to move that end of thelatter to which it is attached and the bur-holder proper toward theneedles until the desired position horizontally of the sinker bur to theneedles is reached, and when this has been done the spring-stop setscrew25 is operated to regulate the tension of the spring 0 upon the bar band the cap K is then screwed up onto the bar b to abut against thegrip-nut O to hold the latter in positionasadjusted. Tomovethebur-holderbar 19 outwardly, the cap K is screwed outwardly, as before, and thegrip-nutis reversed as to movement until the sinker-bu r is moved to thedesired position, when the spring-tension is again regulated and the capK screwed onto the bar 19 to abut against the grip-nut as before. Theparts thus described in their operation constitute the horizontal adjustment of the sinker-bur to the needles.

When it is desired to change thepitch of the bur-blades relatively tothe needles, a wrench is applied to the square head 72, of theworm-shaft 00 by the rotation of which the worm thereon operates theworm-wheel W, that is keyed to the bar 6 so as to move the latter with aslow and limited measure of rotation and Iwhichas rotated will cause thesinker-bur blades to incline from a perpendicular relatively to theneedles more or less,

as maybe desired. This inclination of the sinker-bur enables theoperator of the machine to relatively position the pitch of thebur-blades to the needles with a varied adjustment to adapt to the useof differing yarns andtheir delivery to the needles.

' Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

. The combination witha standardupwardly projected from aknitting-machine table, said standard being provided with alaterally-extended tube-form arm, and having a bracket projectedtherefrom; of a bur-holder bar provided with a shelf on its inner end,and adapted to turn in said tube-form arm; a sinkerbur journaled on saidshelf; a worm-wheel mounted on said bur-holder bar and arranged in arecess formed in said standard-bracket; a shaft provided with bearingsin said bracket and having mounted upon it a worm adapted to. mesh intosaid worm-wheel, whereby as said worm-shaft is rotated, the bur-holdermay be rotated with small measures of movement and thus cause thesinker-bur to incline more or less from a perpendicular and thus give tothe bur-blades a regulated measure of pitch substantially as shown anddescribed.

Signed at Norfolk, Virginia, this 13th day of February, 1897, inthe'presence of the two witnesses whose names are hereto written.

' HENRY V. H. SMITH.

Witnesses:

ROBT. SHULTIOE, WILL DEY.

